CVE-2026-57204

pypdf is a free and open-source pure-python PDF library. Prior to 6.13.3, a maliciously crafted PDF can cause DoS. An attacker who uses this vulnerability can craft a PDF which leads to large memory usage, as MAX_DECLARED_STREAM_LENGTH is sometimes ignored. This requires parsing a content stream without a /Length value. This issue has been fixed in version 6.13.3.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/py-pdf/pypdf/releases/tag/6.13.3	Product Release Notes
https://github.com/py-pdf/pypdf/security/advisories/GHSA-jm82-fx9c-mx94	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:pypdf_project:pypdf:*:*:*:*:*:*:*:*

History

25 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) pypdf es una biblioteca PDF de Python puro, gratuita y de código abierto. Antes de la versión 6.13.3, un PDF creado maliciosamente puede causar DoS. Un atacante que utiliza esta vulnerabilidad puede crear un PDF que provoca un gran uso de memoria, ya que MAX_DECLARED_STREAM_LENGTH a veces se ignora. Esto requiere analizar un flujo de contenido sin un valor /Length. Este problema ha sido solucionado en la versión 6.13.3.

Information

Published : 2026-06-30 22:16

Updated : 2026-10-25 21:10

NVD link : CVE-2026-57204

Mitre link : CVE-2026-57204

CVE.ORG link : CVE-2026-57204

JSON object : View

Products Affected

pypdf_project

pypdf

CWE

CWE-400

Uncontrolled Resource Consumption

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